Bolt head



March 27, '1928. 1,664,207

H. G. FRANCIS BOLT'HEAD A TTORNE Y.

Patented Mar. 27,

YUNITEDr STATES PATENT 0FF1CE,.:

HARRY G. FRANCIS, R'USHVILLE, INDIANA.

BOLT

HEAD.,-4 V a apiicanoniied rebniary 26,1925.V serial No. 11,641.

cated between two sets oi'fI-beams, whichy overhang at both ends beyondsuch material to receive the heads of' turn-buckle bolts bywhichcorresponding I-bea'ms of the two sets may be held from separating, oneof the sets of I-beams being arranged to lie flat on the press tablewhile the otherjs'et co-operates with a compressing member or members.It is desirable that these Ifbeams should vlie flat on the press table;and this is prevented if' the flanges or bases of theI-beams are de-vformed by the action thereon of the'heads of the turn-buckle bolts.

In carrying out my invention, I provide4 a bolt the head of whichconsists of a pair of' arms projecting oppositely from the bolt shankand curving around inward toward each other beyond the bolt shank toembrace the two flanges of a base of an I-beam, on opposite sides of'the central member of vthe beam; and to engage such flanges only atpoints spaced fromv the free edges of the flanges. I use two of thesebolts together, with a turn-buckle to form a turn-buckle bolt; and twosuch turn-buckle bolts, (or pairs of bolts,) in co-operation with two I-beams with the ends of which the turnbuckle bolts co-operate, to providea clamping unit for the material which is compressed in the press.

The accompanying drawing illustrates my invention: Fig. 1 is afragmental end elevation of a veneer press having turnbuckle boltsco-operating with I-beams in accordance with my invention; Fig. 2 is anaxial sectional view, substantially on the line 2 2 of Fig. 3, throughthe head end of a bolt embodying my invention, showing it in its workingrelation to an I-beam; and Fig. 3 is a section on the line 8-3 of Fig.2.

The bolt has a shank 10 provided with a head 11; the head convenientlybeing made as a separate piece from the shank,.such as a malleablecasting, and attached to the shank in any suitable manner, as by havingan axial hole 12 in which the shank 10 is inserted and fastened. Thehead 10 has two arms 13, Whiehlextend oppositely outward` away from thehead-body, and then curve 'toward each other on the oppositeslide'of thehead" from which the shank '10 projects, so that 'they may reach aroundthe flanges f 14 of an yIbeam 15,'as` is clear from Fig. 2. The arms 13vnot only swing around the edges ofthe flanges' 14 ofthe I-beam, but

turn backward slightly toward the head. body 11, or toward the shank 10,so that they terminate in toes 16 which engage V'the flanges 14'of theI-beam only at points reL Q i movedjfrom the edges of said flanges and'close to the web of the Ij-beam. This is clear from Fig. 2. In this way,the edges of vthe 'fiange's 14 are substantially free from distortingpressure, and so thel flange 14 con# sidered as a unitwill remain flatin spite of the pressure exerted by the bolt. lFor strengtheningpurposes, the arms 13 may be provided with yany desired number v ofstrengthening ribs 17.

In Ordinar use, the bolts areassociated in` pairs, to form a singleturn-'buckle bolt. To this end, the shanks 10 are threaded, to receive aturn-buckle 18 which cooperates with the threaded Shanks of two bolts,as is clear from Fig. 1. Two or more turnbuckle blots, each comprising.a turn-buck1e 18 and an associated pair of bolts, co-operate with theprojecting ends of a pairof I-beams 15, to form a generally rectangularclamp unit enclosing an open space. This rectangular clamping unit isassembled around the material to be clamped, such as a stack of veneerstrips 20 assembled between two pressure boards 21. This clamping unitof' two I-beams and two or more turn-buckle bolts, is usually ibut oneof any desired number of such clamping units, used Y j in a press.

To make use of my bolts, the lower I- beams are laid on the table 22 ofthe press, the lower pressure board 21 is put on said I`beams, theveneer strips or other material y to be compressed is put on such lowerpressure board, the upper pressure board is put' in place on the pile ofveneer strips or other material, and the upper I-beams 15 are put,

presses. When the desired compression is 22, and storedvand dried inanysuitable man ner; to permit the use of the press meanwhile forcompressing other units of' material in the same way. Y ,e

Bv reason of having the arms 13 shaped asr above pointed out, theyflanges 111 of the I-beams are kept `from becoming deformed, whichlengthens the life of the Iebeam as well as of the bolt heads 13; and,in addition, the I-beams 15 will all stay in shape so that they will lieflat on the table 22.

I claim as my invention:

1. lA bolt for co-operating with an I-beam, comprising a shank, and aunitary head on said shank, said head having two arms which projectenopposite sides of the shank and curve toward each other to provide aspace for receiving the base flange of an I-bea-In set in the plane ofsaid shanlgsaid This Y arm being provided with toes which engage' thebase flange of said I-beam at points reinovedfrom the edges of'said baseflange and being free from said edges so that the edges will not bedistorted, the distance across the I-beam receiving spacey in thevicinity of said toes being greater than the thickness ol said baseflange where it is engaged by said toes. n

2. A bolt of the character set forth in claim 1, with the addition thatsaid arms have reinforcing ribs thereupon.

3. In combination, two I-beams, two turnbuckle bolts interconnectingsaid I-beams to lprovide therewith an enclosed clamping space, each ofsaid turn-bucklebolts comprising a pair of bolts and a turn-buckle, andeach bolt .of each turn-buckle bolt having a head which has a pair ofarms for curving'around the base flange of the associated Ibeam andengaging the innerface of such flange at points inward from the edgesoff said flange while leaving such edges vand the outer face ofsaid baseflange free from such engagement.

In witness whereof, I have hereunto set my hand at Indianapolis,Indiana, this 21st` day of February, A. D. one thousand nine hundred andtwenty-five.

HARRY G. FRANCIS.

